Radio frequency IC tag and method for manufacturing same
First Claim
1. A radio frequency IC tag including an IC chip for recording information and an antenna for transmitting the information recorded in the IC chip by radio, the antenna comprising:
- a radiating electrode having width that is narrowed at a feeding part in which the IC chip is mounted and including radiating parts of radio wave that spread on both sides of the feeding part and are widened;
a ground electrode disposed opposite to one surface of the radiating electrode and electrically connected to the radiating electrode; and
a dielectric body disposed between the radiating electrode and the ground electrode.
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Accused Products
Abstract
A small radio frequency IC tag which can obtain sufficiently long communication distance with radio wave in the microwave band even if an antenna is made small and the radio frequency IC tag is embedded in metal material. An O-shaped antenna is formed to narrow the width of a neck part in which an IC chip is mounted and widen the width of radiating electrodes constituting radiating part of radio wave. The radiating electrodes are formed into offset structure on right and left sides of the feeding point so that areas of right and left radiating parts of the feeding point in which the IC chip is mounted are unsymmetrical. Further, a ground electrode is provided so that a dielectric body is held between the radiating electrodes and the ground electrode and the radiating electrode is connected to the ground electrode at the side of the dielectric body.
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Citations
24 Claims
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1. A radio frequency IC tag including an IC chip for recording information and an antenna for transmitting the information recorded in the IC chip by radio, the antenna comprising:
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a radiating electrode having width that is narrowed at a feeding part in which the IC chip is mounted and including radiating parts of radio wave that spread on both sides of the feeding part and are widened;
a ground electrode disposed opposite to one surface of the radiating electrode and electrically connected to the radiating electrode; and
a dielectric body disposed between the radiating electrode and the ground electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method for manufacturing a radio frequency IC tag including an IC chip for recording information and an antenna for transmitting the information recorded in the IC chip by radio, comprising the steps of:
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forming a lead frame including a radiating electrode having a neck part and radiating parts of radio wave spreading on both sides of the neck part and a ground electrode connected to the radiating part;
mounting the IC chip in the neck part;
injecting resin into the radiating electrodes;
hardening the injected resin;
coating lead frame projecting outside of the radiating electrode with a protection agent;
cutting the radiating electrode from the lead frame; and
forming the ground electrode along the surface of the hardened resin.
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Specification